Replace node server with Caddy and Hugo

Move Theme in to the repository
  - remove submodules
  - keep all resources in one repo
  - simplify build
  - simplify setup
Migrate stylus to scss
  - stylus is mostly dead and not well understood
  - scss is closer to standard css
Migrate Hexo with Hugo
  - removes need for node
  - hugo used in other redbrick sites
  - hugo has built in scss building
  - cirlceci has predefined build env and tests for hugo
Replace custom node server with caddy
  - replaces custom build process with standard caddy git plugin
  - add support for github and gitea webhooks
Adds basic json interface.

.circleci/config.yaml

@@ -0,0 +1,9 @@
+---
+version: 2.1
+orbs:
+  hugo: circleci/[email protected]
+workflows:
+  main:
+    jobs:
+      - hugo/build:
+          html-proofer: true

.github/PULL_REQUEST_TEMPLATE.md

@@ -4,9 +4,9 @@ Closes #
 
 ### Checklist
 
-*I confirm that before I submitted this pull request I did the following:*
+_I confirm that before I submitted this pull request I did the following:_
 
 - [ ] Confirmed that no other open PRs address this issue.
 - [ ] Checked out the latest version of the site.
-- [ ] Ran `yarn start` and confirmed that there were no issues.
+- [ ] Ran `hugo build` and confirmed that there were no issues.
 - [ ] Annotated my code with the relevant license information (if applicable).

.gitignore

@@ -8,13 +8,6 @@ pids
 *.pid
 *.seed
 
-# Environment variables
-.env
-
-# email update related
-mailing_list
-email_update_log
-
 # Directory for instrumented libs generated by jscoverage/JSCover
 lib-cov
 
@@ -49,3 +42,13 @@ db.json
 _bower_components
 banner-*
 thumb-*
+
+### Hugo ###
+# Generated files by hugo
+/public/
+/resources/_gen/
+
+# Executable may be added to repository
+hugo.exe
+hugo.darwin
+hugo.linux